You already asked this and I replied. Anyways here goes again:
The championship level goes up by one every season. As there is no relegation the championship levels need to grow otherwise you'll end up with everybody on championship level 20. Top 9 players in the level 21 championship will get promoted to level 22 next season and so on and so on
I wouldn't want to be a new player starting out now then - you'd never get to the top level, well without playing for a year or two... Must be quite demotivating once they realise...
Indeed it is possible. I would've thought it would be a far more interesting challenge, rather than offputting, but I guess that depends on the individual.